HOT TUB BALBOA CIRCUIT BOARD GL2000M3 - SPA REPLACEMENT CIRCUIT BOARD - HOT TUB REPAIR Product code: 53708 FOR PLASTIC OUTER BOX ONLY - METAL BOX PCB HAS BEEN DISCONTINUED IMPORTANT: Our boards are tested prior to sending and need to be fitted by a competent Hot tub engineer or electrician. Faulty installment will result in damaging the board and invalidates the warranty. Please compare the Product code with your old Board if not sure please call us!